Is there any evidence the FO simply did not have a panic attack and pass out because he was nervous? Thinking he was about to pass out set the aircraft on a decent thinking it was hypoxia? then having a seizure.
Is there any evidence the cabin door switch was being held in the lock position?
and not just conjecture because of the timing it took the CO to have a pee?
If not, the switch may simply have been in the normal position and the CO forgot the emergency code?
Any evidence to prove this hypothesis wrong?
Also if the FO wanted to commit suicide and mass murder, surely just shut off the fuel supply with his left hand?
Or not.